Secure email gateways: AI search visibility ranking (2026)
How AI search engines rank secure email gateways by visibility and citations. 20 brands measured monthly across Google AI Mode: which brands the AI names in answers, which domains it cites as sources, and how the leaders compare. Email security platforms used to filter threats, block phishing, enforce policy, and protect inbound and outbound mail flows. Composite score: 70% visibility (% of AI answers naming the brand) + 30% citation rate (% citing the brand's domain). Full methodology →
Refreshed Jun 14, 2026Download this ranking as a PDF
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At a glance
What we observed in this categoryauto-generated
Proofpoint leads the secure email gateways category with a visibility score of 50%, nearly 11 times the category average of 4.4%. Mimecast sits second at 37.5%, meaning the top two brands together account for the overwhelming share of AI-generated mentions. Both entered from zero in the previous period, suggesting Google AI Mode began surfacing this category more actively in the current audit window. The gap between rank 2 and rank 3 is stark, with every brand below Mimecast recording zero visibility.
A clear divergence exists between being named and being cited. Proofpoint and Mimecast dominate visibility but carry 0% citation rates, meaning the AI describes them without linking to their domains. Conversely, Material Security, IRONSCALES, and Check Point Harmony Email each hold a 12.5% citation rate despite zero visibility, making them trusted sources without being named in answers. This split signals that AI Mode draws on these brands' own content as reference material while foregrounding competitors in its narrative responses.
The top cited sources in this category are gartner.com, g2.com, youtube.com, reddit.com, and sublime.security, alongside ironscales.com and material.security directly. The presence of reddit.com and youtube.com alongside analyst and review platforms indicates Google AI Mode is anchoring on diverse content types rather than purely vendor or analyst documentation. Both ironscales.com and material.security appearing as cited sources while their brands show zero visibility confirms the AI is using their content as evidence without naming them in the main response body.
Movers & shakers since last refresh
Biggest visibility risers
-
Proofpoint 0% → 50% · rank #0 → #1+50pp
-
Mimecast 0% → 38% · rank #0 → #2+38pp
The ranking
| # | Brand | Visibility | Citation | Top engine |
|---|---|---|---|---|
| 1 |
proofpoint.com
|
50% | 0% | Google AI Mode |
Proofpoint holds 50% visibility, more than 11 times the 4.4% category average, yet carries a 0% citation rate, meaning Google AI Mode names it without linking to its domain. |
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| 2 |
mimecast.com
|
38% | 0% | Google AI Mode |
Mimecast's 37.5% visibility places it well above every other brand except Proofpoint, but like the leader it receives zero citations, giving it no direct referral traffic from AI responses. |
||||
| 3 |
material.security
|
0% | 12% | Google AI Mode |
Material Security records zero visibility but a 12.5% citation rate, the joint highest in the category, meaning its domain is referenced as a source while the brand itself is never named. |
||||
| 4 |
ironscales.com
|
0% | 12% | Google AI Mode |
IRONSCALES mirrors Material Security exactly, with 0% visibility and 12.5% citation rate, and its domain ironscales.com appears directly in the category's top cited sources list. |
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| 5 |
checkpoint.com
|
0% | 12% | Google AI Mode |
Check Point Harmony Email shares the rank 3-5 citation-only pattern at 12.5% citations and zero visibility, making it cited as a reference but absent from any AI-generated answer narrative. |
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| 6 |
trendmicro.com
|
0% | 0% | Google AI Mode |
| 7 |
sophos.com
|
0% | 0% | Google AI Mode |
| 8 |
broadcom.com
|
0% | 0% | Google AI Mode |
| 9 |
abnormalsecurity.com
|
0% | 0% | Google AI Mode |
| 10 |
trustifi.com
|
0% | 0% | Google AI Mode |
| 11 |
cloudflare.com
|
0% | 0% | Google AI Mode |
| 12 |
mailinblack.com
|
0% | 0% | Google AI Mode |
| 13 |
tessian.com
|
0% | 0% | Google AI Mode |
| 14 |
spamtitan.com
|
0% | 0% | Google AI Mode |
| 15 |
n-able.com
|
0% | 0% | Google AI Mode |
| 16 |
egress.com
|
0% | 0% | Google AI Mode |
| 17 |
microsoft.com
|
0% | 0% | Google AI Mode |
| 18 |
cisco.com
|
0% | 0% | Google AI Mode |
| 19 |
barracuda.com
|
0% | 0% | Google AI Mode |
| 20 |
fortinet.com
|
0% | 0% | Google AI Mode |
Sources AI engines trust in this category
Across the 8 buyer-intent queries we ran on secure email gateways, these are the domains Google AI Mode cited most often. If you're not on this list — or if your competitors are — that's a concrete PR / linkbuilding target.
How to read this ranking
Four things worth knowing before you act on the numbers above. These are the same definitions across every industry page — for category-specific observations, see the What we observed section above (where available) and the per-brand insights inline in the ranking.
Visibility = being named
A brand's visibility % is the share of AI answers that mention it by name in the response prose. This is who AI engines actively recommend to the buyer.
Citation rate = being trusted
Citation rate is the share of AI answers that include the brand's domain as a clickable source link. This is what the AI treats as authoritative evidence — different from being named.
Top engine differs by brand
The "top engine" column shows which AI surface each brand performs best on. Big gaps between a brand's score across engines usually points to specific content or schema gaps.
Rankings move month to month
AI engines re-crawl and re-rank on shorter cycles than classical search. We re-audit every brand on this list at least every 30 days and refresh this page automatically.
Get your own secure email gateways brand audited
The brands above were curated from public market-leader lists. Want the same measurement against your own brand — including the queries you appear on, which competitors get named instead, and a prioritised fix list? Run a free preview.
Frequently asked about secure email gateways AI visibility
Who leads AI visibility in the secure email gateways category?
Proofpoint leads with 50% visibility, followed by Mimecast at 37.5%. Every other brand in the 20-brand audit records zero visibility.
Which brands are cited most often by Google AI Mode in this category?
Material Security, IRONSCALES, and Check Point Harmony Email each carry a 12.5% citation rate, the highest in the category, despite recording zero visibility in AI-generated answers.
What sources does Google AI Mode anchor on when answering secure email gateway queries?
The top cited sources are gartner.com, youtube.com, g2.com, sublime.security, reddit.com, ironscales.com, material.security, and dnagdev.medium.com, spanning analyst, review, community, and vendor content types.
Is there a gap between being named in AI answers and being cited as a source?
Yes, a significant gap exists. Proofpoint and Mimecast are named frequently but cited 0% of the time, while three lower-ranked brands are cited at 12.5% without appearing in any AI answer narrative.
How does category-level AI visibility compare to individual brand performance?
The category average visibility is just 4.4%, meaning only Proofpoint at 50% and Mimecast at 37.5% meaningfully exceed it. Fifteen of the twenty audited brands score zero on both visibility and citation.
Are the top visible brands in this category new entrants to AI Mode coverage?
Yes. Both Proofpoint and Mimecast show a visibility delta of 50% and 37.5% respectively from a previous baseline of zero, indicating Google AI Mode began surfacing them only in the current audit period.